' Lithosiidae 



The head and anterior portions of the thorax are pale yellow. 

 The patagia are of the same color. The thorax and the abdomen 

 on the upper side are pale slaty-gray. The legs and the tip of 

 the abdomen on the under side are ochreous, the middle of the 

 abdomen on the under side being dark slaty-gray. The fore wing 

 on the upper side is slaty-gray, with the costa evenly edged with 

 pale yellow. The hind wings are translucent white. On the 

 under side the wings are marked as on the upper side, but paler. 

 The insect is slightly smaller than casta. It occurs in western 

 Pennsylvania. The type, which is in the collection of the author, 

 was taken by him in East Pittsburgh. 



Genus PALPIDIA Dyar 



The genus is represented by only one species, so far as is now 

 known. 



(i) Palpidia pallidior Dyar. (Dyar's Palpidia. ) 



This insect, a drawing of the type 



of which is given in the annexed cut, 



has the fore wings pale ochreous, with the 



interspaces between the veins strongly 



irrorated with dark scales. The hind FlG p a ipidia 



wings are whitish. It is as yet a rare pallidior, ? . {-. 



insect in collections, and has only 



been recorded from Cocoanut Grove, in Dade County, Florida. 



Genus LEXIS Wallengren 



The genus Lexis is of moderate size, all of the species 

 referred to it, with the single exception of the one figured 

 on our plate, being inhabitants of the Old World. The 

 metropolis of the genus appears to be southern Asia and 

 the adjacent islands. One species is recorded from Australia, 

 and the species, which is the type of the genus, is found in 

 East Africa. 



(i) Lexis bicolor Grote, Plate XIII, Fig. 29, $. (The 

 Yellow-edged Lexis). 



Syn. argillacea Packard. 



The moth is pale slaty-grey, with the head, patagia, and 

 anal tuft yellow. The fore wings are bordered on the costa 



105 



